Tube for pneumatic tires



A. E. HENDERSON, TUBE FOR PN'E'umAn-c TIRES, APPLICATION riLgn mac. 26. I915.

Patented Fab. 5, 19%.

17310 W zinesses In ualzlor with means to prevent the pinching of the specification of Letters Patent.

roan non rnnuna'i'rc 1-1: s.

Patented Feb. areas.

Application filed December 26, 1916. serial No. 189,008.

To all whom it may concern.

Be-it known that I, ALBERT ENNIS HEN- Dnnson, a subject of the King of Great Britain, residing at Toronto, Province of Ontario, in the Dominion of Canada, have invented new and useful Improvements in Tubes for Pneumatic Tires, of which th following is a specification.

My invention relates to improvements in inner tubes in which the tube is provided tube by'thebead of the casing in that portion of the tube adjacent to the rim of the are:

First. To provide a tube which carries on or embedded in its rim side the means whereby it is protected from pinches or injury.

Second. To s0 arrange the protection as not to injuriously interfere with the necessary elasticity of the tube, either longitudinally or in cross section. 7

Third. To provide means whereby the rubber of the tube and the protecting material will be guarded against the tendency to separate under strain.

Fourth. To provide means whereby the valve base may be elastically connected with the protecting means.

In my patent for the United States, No. 1176552, dated March 21st, 1916, for which application was filed on August 11th, 1913, I have shown overlapping fabric in a tube located in the tread portion having rubber interposed between the various strips, said overlapping arrangement being longitudinal.

In my patent for the United States, No. 1176553, dated March 21st, 1916, for which application was filed March 7th, 191i, 1 have shown both longitudinal and cross section arrangement of overlapping and elastically connected fabric in the tread portion of the tube and extending around the sides thereof.

In my present application I confine the overlapping fabric to the rim side of the tube, leaving the remaining portion of the body of the tube unrestrained.

I attain these objects by the mechamsm illustrated in the accompanying drawings,

in which- Figure 1, is a plan view of a portion of the completed tube with portions broken away indicating the relation of the component parts.

1 Fig. 2, is a sectional view of the tube showing the transverse relation of the parts shown in- .Fig. 1.

Fig. 3, is a sectional view of a modified form of the tube shown inFigI 1, showing,

the reverse relationship of the protecting 'material. wheel. The objects of my improvements Fig. 4, is a sectional view of the tube showing the transverse relation of the parts as shown in Fig. 10 in plan view.

Fig. 5, shows in cross section the reverse relation of the parts as shown in Figs. 1

and 10.

Fig. 6, is a sectional view of the tube as shown in the plan view, Fig. 12, in which the strips overlap longitudinally, with the strip 3 embedded.

Fig. 7, shows in cross section the relation of the strips as shown in plan view in Fig. 11, in which casethe two inner strips are broken transversely while the outer strip is in one strip.

Fig. 8, shows a single strip embedded on the rim side of the tube unbroken longitudinally.

Fig. 9, is a sectional view of the construction shown in Fig. 12 in plan view, with this difierence, that the wider inner strip is broken transversely while the outer strip is in one piece.

Fig. 10, isa plan view showing a modification of the tube which is shownin cross section in Fig. l.

Fig. 11, is a plan view of a modification oi the tube shown in cross section in Fig. 7.

Fig. 12, is a plan view shown in cross sectign in Fig. 6, with the strip 3 on the outsi e.

' Similar letters refer to similar parts versely at 4 and 4, the rubber of thetube 5 separating the ends of the strips. A longitudinal strip of rubber 6 separates the adjacent edges of the strips 2 and 2 from each other, while a layer of rubber 7 separates the strips 2 and 2 throughout their length from the more deeply embedded strip 3, thus providing a body of rubber between the said strips for the purpose of producing elasticity longitudinally and transversely. The strip 3 is broken transversely at 8, said breaks being disposed in such relation to the breaks in the strips 2 that the ends will overlap longitudinally. The base 9 provided with a slot 10 to permit the insertion of the valve stem from without the tube is so arranged relative to the. protecting strips 2 and 3 as to provide an overlapping elastic connection between the base and the pro-- tecting strips of the tube.

I do not confine myself to the construction of base as shown in Fig. 1, as any form of base may be used, provided there is the overlapping elastic connection between the base and the protecting strips. The strips 2, .2 and 3 may be shown in cross section embedded as in Figs. 1 and 2, in which case the sections of the strips 2 and 2'*are' embedded nearer the surface of the tube than the sections of the strip 3, or as in Fig. 3, in which the sections of the strips 2 and 2 may be more deeply embedded than the sections of the strip 3.

In Figs. 4 and 10 the sections of the strips 2 and 2 are adjacent to the surface of the tube while the strip 3 is embedded andseparated from the strips 2 and 2 by a body of rubber throu hout their entire length.

In Fig. 5 t e sections of the fabric strip 3 are shown adjacent to the surface of the tube while the strips 2 and 2' are embedded and separated from the strip 3 by rubber.

In Fig. 6 the strips 3 and 11 are broken transversely so that the ends overlap, thus providing for longitudinal expansion of the rim side of the tube when necessary.

I In Figs. 7 and 11 the strip 12 is shown unbroken transversely, while the strips 2 and 2' are broken transversely at- 13 and separated by the rubber strip 14L provide for transverse expansion of the tube and longitudinal expansion in that portion of the tube which extends transversely beyond the limitsin cross section of the strip 12, designated at 16.

In Fig. 9 the outerstrip 12 is one continuous piece, as in Figs. 7 and 11, while the strip 11 is broken transversely as at 17, the

ends of the fabric being separated by the rubber 18, thus providin longitudinal expansion only outside the laterally of the strip 12.

In Flgsf 1, 1o, 11 and 12 the wall of the tube has been broken away'at 19, 20, 21 and 22 respectively, showing that not only are all the strips separated from each other by adjacent to the rim side surface of the tube and thereby providing a protection. It will be seen from the drawings and specifications thus far that I have rovided an elastic protection for the rim side of the tube which will replace the ordinary flap which is used'to prevent the tube from being pinched by the show of the outer casing and by the application of the overlapping principle have overcome the difliculties which are incident to any attempt to provide a tube with protecting fabric where this principle is not applied.

*I do not limit myself to the construction shown in the drawings as to the connection of the protecting fabric with the valve base, but may vary the construction as may be expedient, and would also point out that wherever the fabric overlaps, as at point 23, it would be possible to insert a valve stem on the rim side of the tube, having the fabric adjacent to the reduced shoulder of the valve stem, thereby permitting the same to be engaged by the compressing washers of the valve stem.

The specific construction of the valve base disclosed herein is made the subject matter uary 27, 191 Serial No. 144,911.

I do not confine myself to the construction shown in the drawings and described in the specifications as certain modifications in. the application of the principles of my invention may be used without departing from the spirit of my invention.

I claim:

1. A tube for pneumatic tires having its rim side portion provided with an-embedded protection and valve base, the same comprising'a series of unconnected, longitudinally overlapping inelastic fabric strips.

2. A tu e for pneumatic tires having its rim side portion protected by a series of unconnected terminally overlapping fabric strips embedded therein adjacent to the surface of the tube, a valve'base overlappingly connected with the said protecting strips.

3. In combination with a tube for pneumatic tires, having its rim side portion protected by a series of unconnected fabric 75 sible to use the strip 15 either embedded .or l i meme? e3 strips embedded therein adjacent to the surafixefl my signature in the presence of ewe face of the tube and spaced apart by inter- Witnesses. mediate rubber a valve base adapted to receive from wlthout the button of the valve ALBERT ENNIS HENDERSQN' 5 stem, said valve base being" overlappingly Witnesses:

connected with the said protecting series. HUBERT Gr. PAULL,

In testimeny whereof I have hereun'bo A. Wows. 

